How to make OutOfMemoryError occur on Linux JVM 64bit

Question

in my unit test I deliberately trying to raise an OutOfMemoryError exception. I use a simple statement like the following:

byte[] block = new byte[128 * 1024         


        

Answer 1

You could deliberately set the maximum heap size of your JVM to a small amount by using the -Xmx flag.

Launch the following program:

public final class Test {

  public static void main(final String[] args) {
    final byte[] block = new byte[Integer.MAX_VALUE];
  }

}

with the following JVM argument: -Xmx8m

That will do the trick:

Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
    at Test.main(Test.java:4)